# It's harder to poop in space. Scientists may finally know why

> **Open Intelligence Dossier** · First detected: 2026-08-18 17:07 UTC · Category: Health

## Executive Summary
New research indicates that shifts in blood chemistry and gut fermentation patterns contribute to constipation experienced by astronauts in space.

## Intelligence Brief
Recent scientific investigations have addressed the physiological challenges astronauts face regarding bowel movements during spaceflight. According to reports from Space and KXAN Austin, scientists are studying why it is significantly harder to poop in space, focusing on the biological mechanisms that lead to constipation. A new study highlights that the conditions of spaceflight impact the digestive system, leading to a specific set of bathroom problems that have long affected those orbiting the Earth. The research suggests that these issues are not merely mechanical but are rooted in the body's internal response to a microgravity environment. Coverage from StudyFinds emphasizes that findings related to astronauts' blood may provide the necessary hints to explain why spaceflight causes constipation. Further reporting from srpske.rs reveals a specific biochemical shift occurring within the digestive tract, noting that astronaut guts turn to protein fermentation within weeks of being in space.


This transition in how the gut processes nutrients is a key focal point of the current research. News & World Report also covered the development, stating that the new study provides answers to the long-standing problem of constipation in space, framing it as a critical health inquiry for long-term missions. The context of this research is vital because maintaining gastrointestinal health is essential for the well-being of crew members during extended space missions. When the gut shifts toward protein fermentation, as reported by srpske.rs, it indicates a fundamental change in the microbiome or the way the body handles waste. The connection between blood markers and digestive efficiency, mentioned by StudyFinds, suggests that the systemic effects of spaceflight extend beyond simple muscle atrophy or fluid shifts to influence the actual chemical processes of digestion and excretion. Moving forward, the scientific community will likely monitor how these blood-based hints and fermentation patterns can be mitigated.


The coverage indicates that the answers provided by the new study will help in understanding the specific causes of constipation in space. Future observations will likely focus on whether these changes in gut fermentation and blood chemistry can be reversed or prevented to ensure astronaut health. The reports from Space, KXAN Austin, and U.S. News & World Report collectively signal that identifying the cause is a primary step toward developing medical or dietary interventions for space travelers.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| Futurity | Why constipation is common in astronauts | [Source Link](https://news.google.com/rss/articles/CBMiaEFVX3lxTE5yVVgtbUNMQmNaamlCcW9oa2RHTEhvR1J5YUxkZmVUek5HSEFVTzBTVE5HSDdub3luM004LW5keHhDSllObXNFV0JsdDBPY0hzclZwbERFWjJQOHo5NERXNUlKYlV4Tzdt?oc=5) |
| The Economic Times | 52 astronauts left Earth for months in orbit, and within weeks their gut bacteria changed how they process | [Source Link](https://news.google.com/rss/articles/CBMiiwNBVV95cUxPeHBvdER4WTlWV0ZETl9WTHZRdkF4RUpLdi1ONUhmaDd6dGF1bFVZSGh4RnQyWEw4eFFLU001akdNbjNDNVkyUUhuWU12NkdvUmpWX2NsTGxzQmJMOVUtSHV0eDIwMzM4MzI5VmYwWTJMaUowMTR1WTFwNmZkbk1QMENucnU4dFJwSXB3bTZqNmVTVVBVbVRsS3BGZERCbVNqOFRXblVxQi1JZlFCeVlIdnJTOFo0YjJzWjV5aTBqbmplVVdVdkRYbEpqWkJ6UmNEajdpdldvaklzM0h6ekVEc1RpVW1LWm1VbjZ6WVNTRm50N1FsZ0RmeEZGdWI0VjMwYVlYdVpXS01IcFdPcGFsdGE1ZHpZOUl4UUg5WEZfdjdKQlZ2emdyU2Zwazh0T0x3ZlQ0NjlpVWJIVjM2Z2ZuZ3R6RVhFZGRtdmJiZXNVR3NSX0dUU0o) |
| U.S. News & World Report | Constipation In Space: A New Study Provides Answers | [Source Link](https://news.google.com/rss/articles/CBMirwFBVV95cUxQVVcteFZnaEtKM2QwRkVrUXpPdVg3dkVVZlMxazdIUHpNaDFab2NQUENyYVBhRm9JcmNtMERYNFl4UFBJdkpQeVdjZVYwdzlwQkFRRm1aNWJSTEJmUHluVnZCWFR3TG1uOE16cHlNZFg4ejNObG9OSmFtYU5kLXM2cVFQMmJTbTJWeHZGMjRLRm1xcjJUUG1QMTRpWlJWOG16Zy1aM05NSDFqcUFLVWVv?oc=5) |
| StudyFinds | Astronauts’ Blood Hints At Why Spaceflight Causes Constipation | [Source Link](https://news.google.com/rss/articles/CBMia0FVX3lxTFBZbEp3d203S25GTk9odFNNeHU5SElPeTY2RGJqUzZDSXZtZGNvTmpDOVdocVk5UW9aSFBpakFPc2xZSE5LdEJjcjFOenZUV3MyS01Remk0ZlZNMFBhVWxPVUhhNTlBUXBFSGtN?oc=5) |
| srpske.rs | Astronaut Guts Turn to Protein Fermentation in Weeks | [Source Link](https://news.google.com/rss/articles/CBMilwFBVV95cUxNSGh1V2pDeXZ6LU5tTlpOTnRDQ295M1luRmhOOXhoZEFzM1JIU3VxVElSMWRFeTgzWkp2Zlp6eG1hYV9YOTBOSjNNV1ZWenJRVzRWT25Oa1lrTG9MdTdkOEZ3czNUVHVwT21qODBFczdPSTFhV05sbTBxVElyRFZZQUs0c1lpUDd5UHpsOEZja3ZCcTR3UjZJ?oc=5) |
| KXAN Austin | The surprising bathroom problem scientists are studying in space | [Source Link](https://news.google.com/rss/articles/CBMiqAFBVV95cUxNUjk4Yko2MUFHOVJZVDRReEhBY2N0NkxMMGZyaDc2a1A0M2lfVFBpUnZUeTYwblo5Nnp6ZmlaSzFuMEZTNkQ3S21yQUM1bVNVME5PMmtEc3lReTdidDFjV05KeGQ4aXBscFBGbkRWem5IWmZkZXAxc1ZfR1F3VjdvWkdRT0FoT1gtbkp0cFB1NnVyQ19oLUt0Z0gtaTNaRGlyN1RvRFZmYkrSAa4BQVVfeXFMTUFSSnBZVDcxMlJsZEVLZk9LYzBjM3lLUDdYblQyYUZ4MVVZQzh4bnN4cE9KRFBnTFd6VEdiSnZ2UzR3Z0ZWNEIzd2d3NzFiMEtYWmNxSF9SRjFYWVU1aDFTZkZGM3RYYWYzRXAwNEFwTmx6ZC1Vc25VUUxXZ1dqcFAzTERVNVg1TTJ6MEpMT2Q1WkxzdUNkZE9jRzdDU1JOM01HajNKdUtRUmx) |
| Space | It's harder to poop in space. Scientists may finally know why | [Source Link](https://news.google.com/rss/articles/CBMiuAFBVV95cUxQa2VwRTBCU0c0OEw0cHJMME4zbVhkZzJYbXFrLUVJVnBBWW9qb3pnakpVY3dRR2xCLVJpeVkycFdXcTAzaENOS3QwQUJkSGlYcElKSmlCazVpM3V1MzhFZ2UyRHlVZEJHMnQ0amVMM05BVFhTR28tWGh3LXZQaXhOYkkxWjRnMlJOaW4xOGxnd2RxVGZia2ZvZFoxLXJzWDZtV2dibEtRXy1TTzhQUHJ1MTdvLXlOUDBy?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-08-18/it-s-harder-to-poop-in-space-scientists-may-finally-know-why*